CN204486464U - Differential temperature and isothermal roll heater - Google Patents

Abstract

The utility model relates to a differential temperature and isothermal roll heating device. The roll heating device is composed of a heating rod and an insulating tube. The heating rod is covered with an insulating tube. The front section of the heating rod is a heating section, and the rear section is a normal temperature section. The heating section is placed in a hollow roll Inside the roll body, the normal temperature section protrudes from the roll neck to connect with the connecting device; the connecting device consists of three parts: a fixed ring, a rotating cylinder and a moving ring. The normal temperature section of the heating device is fixedly connected; the cooling device is composed of a circulating water pump and a water pipe, and the circulating water pump is connected to the roll bearing housing and the water tank inside the fixed ring through the external water pipe. The utility model can be used for the heating system of rolls that are difficult to form metal materials and need differential temperature rolling to ensure that the surface temperature of a pair of rolls is correctly controlled during the rolling process, and the process parameters of isothermal or different temperature rolling can be realized. Easy replacement and energy saving.

Description

Differential temperature and isothermal roll heating device

technical field

The utility model relates to a rolling heating device for metal plates and strips, in particular to an on-line continuous heating method and device for rolling rolls. Material rolling production.

Background technique

In view of the problems of large deformation resistance and poor plasticity of some metal sheets and strips during cold rolling, the traditional warm rolling or hot rolling process is currently used; the traditional warm rolling or hot rolling process is to heat the metal sheet and strip first , and then rolling on a hot rolling mill or a cold rolling mill. However, since the traditional warm rolling or hot rolling process adopts the method of directly heating the plate and strip, and the thickness of the plate and strip is generally thin and the heat capacity is small, the heat dissipation speed of the plate and strip is fast during the rolling process, and the temperature of the material is difficult to guarantee. , resulting in a decrease in the plasticity of the metal material, cracks are prone to appear during the rolling process, and the scrap rate is high. Therefore, the application of traditional warm rolling or hot rolling process methods is thus limited. The current online hot roller method is being used. For example, Chinese Patent Application No. 200510086721.X (Roll Center Heating Device for Magnesium Alloy Strip Warm Rolling Roll), 200810036132.4 (Roll Heating System for Magnesium Alloy Sheet Rolling), and 201310518804.6 (An On-line Continuous Roll Heating Device and Its Processing Method), etc. The utility model realizes on-line continuous heating of the roll during the rolling process. These utility models mainly install fixed heating rods in the hollow rolls, and control the surface temperature of the rolls through a temperature control device to ensure the rolling temperature of the strip.

Chinese Patent Application No. 200510086721.X (Roll Core Heating Device for Magnesium Alloy Strip Warm Rolling Roll) discloses a roll core heating device. A fixed heating rod is installed inside the hollow roll, and one end of the heating rod is fixed on the bracket by a clamping device. The other end is supported in the roll by a cantilever, and the thermocouple inside the roll core is used to reflect the surface temperature of the roll to determine whether the heating rod continues to heat. The heating rod of this roll core heating device is fixed in the roll and does not rotate synchronously with the roll. The heating rod is directly connected with the controller through wires.

Chinese Patent Application No. 200810036132.4 (Roll Heating System for Magnesium Alloy Plate Rolling) discloses a roll heating system. Multiple heaters are placed inside the roll, and the roll is heated by the built-in heater in the roll heating device. The roll heating device Includes brush slip rings, bearings, rolls and heaters. One end of the brush slip ring is connected to the temperature control box, and the other end is connected to the heater to provide the required voltage for the heating tube; one end of the heater is connected to the brush slip ring, and the other end is inserted into the roll to heat the roll. The heater and brush slip ring rotate synchronously with the roll. The heating rod is connected with the controller through a brush slip ring.

Chinese patent application number 201310518804.6 (an on-line continuous roll heating device and its processing method) discloses an on-line continuous roll heating device, including a roll, a plurality of electric heating rods, a stepless brush rotation mechanism, and a stepless brush fixing mechanism and bearing assemblies. A plurality of electric heating rod sockets are equidistantly arranged in the roll along the circumferential direction, and the multiple electric heating rods are respectively inserted in the multiple electric heating rod sockets. The stepless brush rotating mechanism includes a stepless brush rotating component, a first stepless brush rotating conductor, a second stepless brush rotating conductor, a first insulating sleeve, and a second insulating sleeve. The stepless brush fixing mechanism includes the first stepless brush fixed conductor, the first conductive spring, the second stepless brush fixed conductor, the second conductive spring, the first insulating bushing, and the second insulating bushing. This utility model device is substantially similar to the Chinese patent application No. 200810036132.4 (magnesium alloy plate rolling roll heating system), the heater and the roll rotate synchronously. The heating rod is connected with the controller through a brush slip ring. The above-mentioned utility models for on-line and continuous heating of the rolls mainly have the following problems: the heating rod of the roll core heating device is fixed and does not rotate synchronously with the rolls, such as Chinese Patent Application No. 200510086721. Heating device) After the roll is heated for a long time, a large amount of scale will appear in the cavity of the roll core, which will fill up the surrounding of the heating rod, causing the heating rod to rotate and break. And for the roller core heating rod synchronously rotating with the roll, the heating device connected by electric brushes will cause a large current to pass through the connection of the electric brushes to generate ignition and heat generation.

Chinese Patent Application No. 201310246053.7 (a device and method for different temperature rolling of magnesium alloy) discloses a device and method for different temperature rolling of magnesium alloy. . The rollers are heated by means of radiant heating. This heating method limits the adjustment range of the reduction of the upper and lower rolls. At the same time, it is difficult for the rolled piece to enter the roll. If the rolled piece exits the roll up or down, the rolled piece will easily rush to the heating device, causing damage to the heating device. The feature of the magnesium alloy different temperature rolling method described in the application number 201310246053.7 is that the temperature of the upper roll and the lower roll is controlled between room temperature and 450°C, and the temperature of the upper roll and the lower roll is different, so that the rolling deformation A temperature difference is generated between the upper and lower surfaces of the magnesium alloy plate in the region. The temperature of the upper roll is controlled at 180-300°C, the temperature of the lower roll is controlled at 300-400°C or the temperature of the lower roll is controlled at 180-300°C, and the temperature of the upper roll is controlled at 300-400°C. It does not propose a specific temperature range protection range for differential temperature rolling.

Contents of the invention

The utility model aims at the deficiencies of the prior art, and provides a differential temperature and isothermal roll heating device, which is used for difficult-to-form metal materials (including magnesium alloys, titanium alloys) and roll heating systems that require differential temperature rolling, ensuring the rolling process Correctly control the surface temperature of a pair of rolls in the process to achieve the technical parameters of isothermal or different temperature rolling, and the heater is easy to replace and saves energy.

In order to achieve the above object, the technical solution adopted by the utility model is: a differential temperature and isothermal roll heating device, which has a roll heating device installed in the hollow roll, a coupling device for fixing and rotating the roll heating device, A cooling device for cooling the coupling device and the bearing seat of the hollow roll, and a control device for controlling differential temperature or isothermal rolling. The roll heating device is composed of a heating rod and an insulating tube. The heating rod is wrapped with an insulating tube. The front section of the bar is the heating section, and the back section is the normal temperature section. The heating section is placed in the roll body of the hollow roll, and the normal temperature section extends out of the roll neck to connect with the connecting device; the connecting device consists of three parts: a fixed ring, a rotating cylinder and a moving ring. , the fixed ring and the moving ring are rotationally connected by a rotating cylinder, and the moving ring is fixedly connected to the normal temperature section of the heating rod; the cooling device is composed of a circulating water pump and a water pipe, and the circulating water pump is connected to the roll bearing housing and the inside of the fixed ring through the external water pipe Sink hookup provided.

The length of the heating section is the same as the length of the roll body, and the length of the normal temperature section is the sum of the roll neck length, the roll head length and the roll protruding length.

The control device is composed of a temperature control box, a transformer, a thermocouple sensor and a computer. A thermocouple sensor is installed in each roll separately. One end of the thermocouple sensor is connected to the temperature control box, and the other end is in contact with the surface of the roll for measuring the surface of the roll. temperature, the heating rod is connected to the transformer, and the transformer and the temperature control box are connected to the computer.

The beneficial effects of the utility model are: the utility model can be used for difficult-to-form metal materials (including magnesium alloys, titanium alloys) and roll heating systems that require differential temperature rolling, to ensure that the surface temperature of a pair of rolls is correctly controlled during the rolling process, Realize the requirements of the technical parameters of isothermal or different temperature rolling, and the heater is easy to replace and saves energy.

Description of drawings

Fig. 1 is the structural system schematic diagram of the present utility model;

Fig. 2 is a schematic diagram of the position of the heating device and the cooling device in the roll;

Fig. 3 is a structural cross-sectional view of the coupling device;

Fig. 4 is a left side view of Fig. 3 .

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figure 1, a differential temperature and isothermal roll heating device includes a roll heating device, a control device, a coupling device, and a cooling device.

As shown in Figure 2, the roll heating device consists of a heating rod 3 and an insulating tube. The heating rod 3 is covered with an insulating tube. The front section of the heating rod 3 is a heating section 11, and the rear section is a normal temperature section 12. Inside the roll body, the normal temperature section 12 extends out of the roll neck and connects with the coupling device 8 . The core of a conventional roll 1 is machined into a circular cavity in the axial direction. The elongated heating rod 3 is made into two parts along the length: the heating section 11 and the normal temperature section 12. The length of the heating section 11 is basically the same as the length of the body of the roll 1, and the length of the normal temperature section 12 is the length of the roll neck and the length of the roll head of the roll 1. and the sum of the protruding length of roll 1. The outermost end of the room temperature section 12 is equipped with a moving copper ring of the coupling device 8 . The heating rod 3 is covered with an insulating tube. The heating section 11 of the elongated heating rod 3 is located within the roll body range of the hollow roll 1 to ensure that the working part of the roll body of the roll 1 is heated.

The cooling device is composed of a circulating water pump 14 and a water pipe 16, and the circulating water pump 14 is connected with the water tank 15 inside the roll bearing housing 13 and the fixed ring 20 through the external water pipe 16. When the roll 1 is heated, the circulating water pump 4 works to take away part of the heat of the bearing 2 of the roll 1 and the fixing ring 20 of the heating rod 3 through the circulating water.

As shown in Figures 3 and 4, the coupling device 8 is composed of three parts: a fixed ring 20, a rotating cylinder 22 and a moving ring 21. The fixing ring 20 and the moving ring 21 are connected by rotating the rotating cylinder 22. The normal temperature section 12 is fixedly connected. The fixing ring 20 is installed on one side of the control device. The moving ring 21 is combined with the fixed ring 20 on the control device 8 to have a series of rotating cylinders 22 arranged in parallel inside. Due to gravity, the rotating cylinder 22 is always in contact with the fixed ring 20 and the moving ring 21 . When the roll 1 rotates, the heating rod 3 can rotate or be stationary. If the heating rod 3 rotates, the moving ring 21 and the heating rod 3 rotate synchronously. The rotating cylinder 22 rotates between the moving ring 21 and the fixed ring 20 .

As shown in Figure 1, the control device is composed of a temperature control box 7, a transformer 5, a thermocouple sensor 4 and a computer 6. A thermocouple sensor 4 is separately arranged in each roll 1, and one end of the thermocouple sensor 4 is connected to the temperature control box 7. The other end is in contact with the surface of the roll 1 for measuring the temperature of the surface of the roll 1 , the heating rod 3 in the heating device is connected to the transformer 5 , and the transformer 5 and the temperature control box 7 are connected to the computer 6 .

A rolling method using a differential temperature and isothermal roll heating device. First, the user individually sets the surface temperature of each roll 1 through a computer 6. When each roll 1 is heated, the thermocouple sensor 4 at the temperature measurement point measures the surface temperature of the corresponding roll. Simultaneously feed back to computer 6, carry out real-time monitoring to each roll 1 temperature, computer 6 judges whether each roll 1 surface temperature reaches set temperature according to user's temperature setting, to control whether heating device continues to work.

The surface temperature of each pair of rolls 1 can be heated at the same temperature or at different temperatures according to user requirements. The heating temperature of each roll 1 can be controlled between room temperature and 550°C, and the temperature difference between the upper and lower rolls 1 can be controlled within a range of 0°C to 500°C. The temperature difference between the two rolls of metal differential temperature rolling is 20~200°C, the temperature of the upper roll can be higher than that of the lower roll, and the temperature of the lower roll can also be higher than that of the upper roll. The metal material is rolled by the rolls having the surface temperature difference in this way, so that the upper and lower surfaces of the metal material located in the rolling deformation zone have a temperature difference.

Claims (3)

1. a differential temperature and isothermal roll heater, there is a roll heater be arranged in hollow roll, a coupling arrangement (8) fixed and rotate for roll heater, the cooling device of a cooling of the bearing block for coupling arrangement and hollow roll, one for controlling the control device of differential temperature or ausrolling, it is characterized in that: described roll heater is made up of heating rod (3) and insulation tube, heating rod (3) outsourcing insulation tube, heating rod (3) leading portion is bringing-up section (11), back segment is normal temperature section (12), bringing-up section (11) is placed in hollow roll (1) body of roll, normal temperature section (12) is stretched out roller neck and is connected with coupling arrangement (8), described coupling arrangement (8) is made up of retainer ring (20), rotating cylindrical (22) and sports ring (21) three part, be connected by rotating cylindrical (22) turn between retainer ring (20) with sports ring (21), sports ring (21) is fixedly connected with the normal temperature section (12) of heating rod (3), described cooling device is made up of water circulating pump (14), water pipe (16), and the tank (15) that water circulating pump (14) is provided with by outer water tube (16) and roll chock (13) and retainer ring (20) inside is connected.

2. differential temperature according to claim 1 and isothermal roll heater, it is characterized in that: described bringing-up section (11) length is identical with roll (1) barrel length, normal temperature section (12) length is the outer extension elongation sum of roller neck length, roller head length and roll.

3. differential temperature according to claim 2 and isothermal roll heater, it is characterized in that: described control device is made up of temperature-controlled box (7), transformer (5), thermocouple sensor (4) and computer (6), a thermocouple sensor (4) is set separately in each roll (1), thermocouple sensor (4) one end connects temperature-controlled box (7), the other end and roll (1) surface contact, for measuring the temperature of roller surface, heating rod (3) connection transformer (5), transformer (5) is connected computer (6) with temperature-controlled box (7).